Cottonoid® is destined to protect delicate tissue and nervous structures during a creaniotomy or a laminectomy. Moreover, they are used in the same processes for hemostasis. They are always used moist and are immersed in saline or water previous to its application. They are made up of Cottonoid, material of synthetic fibers that keeps its structure moist, it absorbs five times its weight in less than a second and it easily adapts to uneven surfaces. The material is porous, and this allows the suction through the Pattie without sucking in the tissue or the product itself. It has an x-ray detectable barium sulfate monofilament. This monofilament is also ultrasonically adhered, so it has no protuberances and it is a part of the Cottonoid® surface.